<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<img src="{{url_for('static', filename='xxxx.png')}}" alt="">
<img src="{{url_for('static', filename='yyy.png')}}" alt="">
<img src="{{url_for('static', filename='qqqqq.png')}}" alt="">
<img src="{{url_for('static', filename='zzzzz.jpg')}}" alt="">
</body>
</html>